@media (max-width: 991.98px) {
  .struktur-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .navbar-collapse { margin-top: 10px; padding: 14px; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: #fff; }
}
@media (max-width: 575.98px) {
  .section { padding: 68px 0; }
  .hero { min-height: auto; padding: 110px 0 68px; }
  .hero-logo-wrap { width: 104px; height: 104px; }
  .about-stats { grid-template-columns: 1fr; }
  .struktur-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .student-details li { flex-direction: column; gap: 3px; }
}